![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-pers-1.jpg?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-pers-2.jpg?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-detail-1.jpg?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-detail-2.jpg?v=1712569661&width=2400)
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![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-detail-4.jpg?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-side-m.gif?v=1712569661&width=2400)
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[Refurbished] Fluorostar 120
Condition:
Near Mint – Almost Like New
Warranty:
One-Year Warranty with Official Warranty Card
Introducing the Fluorostar 120 APO from William Optics, a precision-crafted apochromatic refractor designed to meet the exacting demands of modern astrophotographers. With a 120mm aperture and a 780mm focal length (f/6.5), this telescope is optimized for both clarity and performance.
The Fluorostar 120 features a triplet lens system using FPL-53 glass, ensuring superior aberration correction and crystal-clear imaging. It is equipped with a heavy-duty 3.3" Rack & Pinion focuser with a built-in rotator, allowing for precise focusing and easy framing of celestial objects.
Durably constructed, the telescope includes a newly designed saddle handle bar made from CNC-anodized aluminum, which also serves as a mount for William Optics uniguide and other Vixen-type finder bases. The integrated patented Bahtinov Mask, made from a material three times lighter than traditional masks, ensures perfect focusing with ease.
This telescope's mounting system includes a Losmandy-type plate, providing solid support and versatility in setup. Whether capturing distant galaxies or shooting detailed lunar landscapes, the Fluorostar 120 APO is an excellent choice for serious astrophotography endeavors, offering both robust construction and stunning optical performance.
GuideStar Special









GuideStar 61
- Lens Type
- Doublet APO Prime Lens
- Focal Length
- 360 mm
- Diameter
- 61 mm
- Focal Ratio
- f/5.9
- Image Circle
- 42 mm
- Focuser
- Threaded Focuser
- Adapter Included
- M54 → 2" Visual Back
- Optional Flattener
- FLAT 61A 1.0x FLAT 61R 0.8x
- Tube Length
- 340 mm
- Total Weight
- 1.44 kg / 3.17 lbs
Accessory Add-ons
Guider










UniGuide 32mm f/3.75
- Lens Type
- Doublet Lens
- Focal Length
- 120 mm
- Diameter
- 32 mm
- Focal Ratio
- f/3.75
- Tube Length
- 147 mm
- Total Weight
- 0.23 kg / 0.51 lbs





Guiding Scope 50mm f/4.0
- Lens Type
- Doublet Lens
- Focal Length
- 200 mm
- Diameter
- 50 mm
- Focal Ratio
- f/4.0
- Tube Length
- 252 mm
- Total Weight
- 0.42 kg / 0.93 lbs










UniGuide 50mm f/4.0
- Lens Type
- Doublet Lens
- Focal Length
- 200 mm
- Diameter
- 50 mm
- Focal Ratio
- f/4.0
- Tube Length
- 252 mm
- Total Weight
- 0.5 kg / 1.1 lbs








GuideStar 61
- Lens Type
- Doublet APO Prime Lens
- Focal Length
- 360 mm
- Diameter
- 61 mm
- Focal Ratio
- f/5.9
- Image Circle
- 42 mm
- Focuser
- Threaded Focuser
- Adapter Included
- M54 → 2" Visual Back
- Optional Flattener
- FLAT 61A 1.0x FLAT 61R 0.8x
- Tube Length
- 340 mm
- Total Weight
- 1.44 kg / 3.17 lbs
Camera





ZWO ASI 120MM Mini
- Sensor
- AR0130CS CMOS ( color )
- Resolution
- 1280 x 960
- Pixel Size
- 3.75μm
- Sensor Size
- 1/3″ ( 4.8 mm x 3.6 mm )
- Max Frame Rate
- 35 fps
- Read Noise
- 4.0e
- Quantum Efficiency
- 80%
- Exposure Range
- 64µs-1000s
- ADC
- 12 bit
- Flange Distance
- 8.5mm
- Camera Thread
- M28.5
- Adapter Included
- 1.25" Extender ( 22mm ) CS → M28.5 Adapter ( 4mm )
- Interface
- ST4 USB 2.0 Type-C
- Cable Included
- ST4 ( 2m ) USB 2.0 Type A↔C ( 0.5 & 2m )
- Camera Weight
- 60 g / 2.1 oz
Camera Adapter






Elite Drawer OAG Kit
- Light-In Side
- M54, M48, M68
- Light-Out Side
- Main: M54, M48 ( M42 optional ) / Guide: M42, 1.25" push-in
- Optical Length
- 37.5 mm
- Weight
- 336 g / 11.85 oz

M42 Adapter for Elite Drawer OAG Kit
- Light-In Side
- Trapezoid lock structure for OAG
- Light-Out Side
- M42 × 0.75



M48 T-mount for Nikon Z Mirrorless
- Light-In Side
- M48 (female)
- Light-Out Side
- Nikon Z Mirrorless Camera Mount
- Optical Length
- 38.4 mm






M48 T-mount for Nikon F
- Light-In Side
- M48 (female)
- Light-Out Side
- Nikon F Camera Mount
- Optical Length
- 8.2 mm



M48 T-mount for Canon EOS R Mirrorless
- Light-In Side
- M48 (female)
- Light-Out Side
- Canon EOS R Camera Mount
- Optical Length
- 34.4 mm






M48 T-mount for Canon EOS
- Light-In Side
- M48 (female)
- Light-Out Side
- Canon EOS Camera Mount
- Optical Length
- 10.6 mm



T-mount for Sony E
- Light-In Side
- M48 (female)
- Light-Out Side
- Sony E Camera Mount
- Optical Length
- 36.7 mm



M48 T-mount for Pentax K
- Light-In Side
- M48 (female)
- Light-Out Side
- Pentax K Camera Mount
- Optical Length
- 9.3 mm



M48 T-mount for Fuji FX
- Light-In Side
- M48 (female)
- Light-Out Side
- Fuji FX Camera Mount
- Optical Length
- 37 mm



M48 T-mount for Olympus Micro 4/3
- Light-In Side
- M48 (female)
- Light-Out Side
- Olympus Micro 4/3 Camera Mount
- Optical Length
- 35.6 mm


M48 → M42 Adapter
- Light-In Side
- M48 (female)
- Light-Out Side
- M42 (male)
- Optical Length
- 5.3 mm
EQ Mount







ZWO AM5N RedCat Limited Edition
ZWO x William Optics Co-branded Limited Edition
Traditional equatorial mounts often require heavy counterweights, making them cumbersome to transport and balance. The AM5N addresses these challenges with a compact, counterweight-free design, offering enhanced portability and stability for amateur astrophotographers. Its optimized internal structure incorporates harmonic drive reducers and timing belts, delivering precise control and a 300:1 reduction ratio. The mount operates in both equatorial and alt-azimuth modes and can be controlled via Wi-Fi, Bluetooth, or a handheld controller.
Key Features
Enhanced Portability and Stability
Weighing only 5.5 kg, the AM5N supports payloads up to 15 kg without counterweights and up to 20 kg with counterweights, maintaining a balance between portability and performance.
Custom Harmonic Drive System
The AM5N features a custom harmonic drive system with a synchronous belt, ensuring high torque, zero backlash, and low periodic error of ±10 arcseconds.
Integrated Cable Management
Internal cable routing through the DEC saddle allows for seamless power and control connections, reducing cable clutter and the risk of snags during operation.
Dual Mount Modes
Switch effortlessly between equatorial and alt-azimuth modes using the ASI Mount App or the included hand controller. A status LED indicates the current mode: red for equatorial and green for alt-azimuth.
Wide Latitude Adjustment
The mount offers a full 0°–90° latitude adjustment range, accommodating various observing locations and setups.
Wireless and Wired Control Options
Control the AM5N via Wi-Fi, Bluetooth, or USB-C connections. The mount is compatible with the ASIAIR system and supports ASCOM and INDI protocols for versatile operation.
Power Failure Protection
An RA axis brake system engages automatically during power failures, safeguarding your equipment from potential damage.
Seamless ASIAIR Integration
The AM5N integrates seamlessly with ZWO's ASIAIR system, providing an optimized astrophotography experience through wired or wireless connections.



Counterweight Shaft
- Material
- Aluminum alloy
- Diameter
- 20 mm
- Shaft Length
- 680 mm

Tripod







Pier Mount 90
- Adapter
- 3/8" Thread ( for ZWO AM3/AM5 )
More EQ Mount types are optional - Weight
- approx. 7 kg
- Loading Capacity
- 90 kg / 198 lbs
- Height
- Stance: 89.3 cm Closed: 79.3 cm Foot Adjustable Height Range: 15 mm
- Material
- Aluminum Alloy
- Pillar Diameter
- 100 mm / 4"
![[Bundle] ZWO Mount Upgrade Kit](http://williamoptics.com/cdn/shop/files/ZWOMountUpgradeKit.jpg?v=1724140371&width=2400)
[Bundle] ZWO Mount Upgrade Kit
Make your ZWO AM3/5 tripod kit load-bearing and stable.


Tripod Extrapadding Backpack
This Tripod Extrapadding Backpack is specifically designed for astro EQ mounts tripod, offering added support and protection for your equipment.
- Thickness: 22mm
- Size: approximately 20 × 20 × 67 cm, with a measurement tolerance of ±3 cm.














Camouflage Tripod Pouch
Featuring durable Velcro straps for secure attachment, this pouch offers ample storage space to make your wildlife observation experience more convenient.
- Lens Type
- Triplet APO Prime Lens
- Focal Length
- 780 mm
- Diameter
- 120 mm
- Focal Ratio
- f/6.5
- Image Circle
- 43 mm
- Focuser
- 3.3" R&P Focuser Compatible with EAF
- Adapter Included
- M92 Rotator M92 → 2" RotoLock 2" → 1.25" Visual Back
- Optional Flattener
- FLAT 68III 1.0x FLAT 7A 0.8x (requires adapter)
- Camera Format
- Full Frame APS-C M4/3
- Dovetail Type
- Losmandy
- Tube Length
- 680 mm - 850 mm
- OTA Weight
- 7.1 kg / 15.65 lbs
- Total Weight
- 9.45 kg / 20.83 lbs
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-pers-1.jpg?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-pers-2.jpg?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-detail-1.jpg?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-detail-2.jpg?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-detail-3.jpg?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-detail-4.jpg?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-side-m.gif?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-side-2.jpg?v=1712569661&width=2400)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-pers-1-gold.webp?v=1757554839&width=1000)
![[Refurbished] Fluorostar 120](http://williamoptics.com/cdn/shop/files/FLT-120-pers-1-grey.jpg?v=1712716791&width=2400)
Introducing the Fluorostar 120 APO from William Optics, a precision-crafted apochromatic refractor designed to meet the exacting demands of modern astrophotographers. With a 120mm aperture and a 780mm focal length (f/6.5), this telescope is optimized for both clarity and performance.
The Fluorostar 120 features a triplet lens system using FPL-53 glass, ensuring superior aberration correction and crystal-clear imaging. It is equipped with a heavy-duty 3.3" Rack & Pinion focuser with a built-in rotator, allowing for precise focusing and easy framing of celestial objects.
Durably constructed, the telescope includes a newly designed saddle handle bar made from CNC-anodized aluminum, which also serves as a mount for William Optics uniguide and other Vixen-type finder bases. The integrated patented Bahtinov Mask, made from a material three times lighter than traditional masks, ensures perfect focusing with ease.
This telescope's mounting system includes a Losmandy-type plate, providing solid support and versatility in setup. Whether capturing distant galaxies or shooting detailed lunar landscapes, the Fluorostar 120 APO is an excellent choice for serious astrophotography endeavors, offering both robust construction and stunning optical performance.









